Nanoparticles materials

Oluwafemi, O. S. Revaprasadu N and Adeyemi O. O. (2010). A new synthesis of hexadecylamine-capped Mn-doped wurtzite CdSe nanoparticles. Material Letter, 64, 1513-1516. 

An apparatus to fractionate size-selectively small quantities (sub-milligram quantities of nanoparticle material) is presented in Figure 2.4b [19]. This apparatus consists... 

Another advantage cited for organic electronics is their perceived low environmental impact and high expected consumer safety. This assumption is generally based on the notion that plastics are easily recycled and are considered safe to humans and animals. However, the materials used are often completely new compositions with poorly understood health and safety attributes. The assumption that all plastics are completely safe for humans is inaccurate, as is exemplified by recent concerns about the toxicity of polyvinyl chloride (PVC).39 In contrast, most inorganic nanoparticle materials are already on the consumer market and have extensive historical data on their safety in a variety of applications. Some materials, such as zinc oxide, are even considered reasonably safe for ingestion and therefore are commonly used in food and cosmetics. However, the health effects and interactions of nanoparticles on the human body are still a topic of debate.40... 

Asher, S. A., Crystalline colloidal array chemical sensing devices, In ACS PRF summer school on nanoparticle materials, June 6 18, 2004. Eastern Michigan University, Ypsilanti, MI, 2004... 

Films of materials deposited at or near room temperature (and in this respect 100°C is considered to be near room temperature) tend to have a small crystal size. This is not surprising since high temperatures are normally required to impart sufficient mobility to a freshly deposited species in order for recrystallization to occur. This small crystal size, which at one time was almost universally considered to be a disadvantage, is increasingly considered to be an advantage as interest in nanocrystalline and nanoparticle materials grows. The term nano crystalline usually refers to materials with a crystal size from a nanometer up to hundreds of nanometers (at this upper limit, the term microcrystalline starts to take over). 

Abstract The complex tetra(imidazole)chlorocopper(II) chloride, [Cu(imidazole)4Cl]Cl, has been synthesized, and the structure has heen determined at the Small Crystal X-ray Crystallography Beamline (11.3.1) of the Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory (LBNL), USA. Structural parameters of the parent complex are compared to similar materials previously reported in the literature. The particles in the present study can be used to prepare nanoparticle materials, or, by controlled growth, can be formed as nanoparticles initially. The structural data are important for making detailed calculations, models, and deriving reaction mechanisms involving metal ion-based biochemical systems. 

Nanoparticle materials are important because they exhibit unique properties due to size effects, quantum tunneling, and quantum confinement. As sizes of embedded particles are reduced to the nanometer scale, the surface-to-bulk ratio increases significantly. Therefore, surface effects can dominate bulk properties and an understanding of nanosurfaces becomes important. In this chapter, we discuss characterization of vacancy clusters that reside on surfaces of embedded nanoparticles as well as studies on the correlation of surface vacancy clusters to the properties of the nanomaterials. 

Other examples of the preparation of semiconductor nanocrystallites by solution methods can be found in the literature [1-3]. Solution methods provide a cheap route to many nanoparticle materials. However, a lack of reaction control can be problematic when larger scale preparations are necessary. Also several important semiconductors are not easily obtained by this preparative method, with some being air and/or moisture sensitive, e.g. GaAs and InSb. 

Evaluate new nanoparticle materials s mthesized as candidate photocatalysts... 

B.l. Lee, R.C. Bhave, Experimental variables in the S3mthesis of brookite phase Ti02 nanoparticles . Materials Science and Engineering A, 467, 146-149, (2007). 

Kakran, M., Sahoo, N.G., Antipina, M.N., and Li, L. Modified supercritical antisolvent method with enhanced mass transfer to fabricate drug nanoparticles. Materials Science and Engineering C 33 (2013) 2864-2870. 

I.-Y Jeon, J. Back, -B. Nanocomposites Derived from Polymers and Inorganic Nanoparticles. Materials 2010,3,3654-3674. 

Influence of nanoparticle materials on the photophysical behavior of phthalocyanines 13CCR2401. 

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